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https://github.com/CopilotKit/CopilotKit.git
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Mike Ryan
547329fe09
A nullable frontend tool field can reach the built-in agent as `anyOf:
[{type: "string"}, {type: "null"}]`. The converter handles the union but
throws `Invalid JSON schema` for its null branch before the model is
called. This matches R14 in the September 3–8 onboarding friction audit.
Accept explicit null branches when converting frontend tools. Required
nullable fields still require a value; optional fields can be omitted.
Invalid non-null values still fail validation.
Validation:
- RED: both the explicit anyOf input and a real Zod v4 nullable schema
failed with `Invalid JSON schema` before the fix.
- `pnpm nx test @copilotkit/runtime` — 2,293 tests passed, including
HTTP runtime integration tests.
- `pnpm nx test @copilotkit/runtime --
src/agent/__tests__/nullable-tools.test.ts` — 3 focused tests passed
after the final test typing change.
- `pnpm nx run-many -t test,check-types,build -p @copilotkit/runtime`
passed on the revised head (2,293 tests).
- `pnpm exec oxlint packages/runtime/src/agent/index.ts
packages/runtime/src/agent/__tests__/nullable-tools.test.ts` — no
errors; three existing shadowing warnings.
- `pnpm exec oxfmt --check packages/runtime/src/agent/index.ts
packages/runtime/src/agent/__tests__/nullable-tools.test.ts` and `git
diff --check` passed.
No live model request was needed: the regression exercises the actual
AG-UI-to-model-tool conversion and validates accepted and rejected
arguments.
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **Bug Fixes**
- Improved handling of nullable tool fields, including nullable unions,
arrays, and fields generated by Zod.
- Invalid values and missing required fields continue to be rejected
during tool schema validation.
- **Compatibility**
- JSON Schema type declarations now use a single type value; arrays of
schema types are no longer converted automatically.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->